Please help #22 thanks!

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Solutions for 2x+7 less than or equal to 3x-5

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?